base in benghazi, killing the ambassador. >> hundreds of protesters turned on police after storming the u.s. embassy in sanaa. the aggression is spreading through the middle east in egypt, tunisia, and iraq. the attack in benghazi killed ambassador chris stevens and three other americans. >> we are closely watching what is happening in yemen and elsewhere. >> secretary of state hillary clinton also spoke harshly of the amateur video made in the u.s. that sparked it all. many have called it blasphemous towards islam. >> this video is disgusting and reprehensible. >> during "the today show," john mccain said that he believes the attacks were organized and that ambassador stevens was a target. >> the indications of how this attack was carried out indicate that that is the case. >> the u.s. is working with the government of libya to figure out who was responsible for the attack. and nbc national security analyst predicts that bringing the perpetrators to justice may not be an easy road. >> ultimately, we are going to be very reliant on the government of libya. >> still to come, if you think